Cyrenius lawrence



(Nmodel') o. LAWRENCE.

CRIB.

No. 400,693. Patented Apr. 2,1889..

Flai.

wi'nesses, I I (j nvenow N.'v PETERS. Plmxu-Lnnngmphen Wnsmnglun. u. c,

I may be driven through the same, thus makand combination of the variousparts of my f out and describe, reference being had to the UNITEDSTA-TES cYEENIus LAWRENCE,

PATENT CEEICE.

OF CLYDE, MICHIGAN.

CRIB.

SPECIFICATION forming part of Letters Patent No. 400,693, dated April 2,1889.

Application tiled February 25, 1888. Serial No. 265,332. (No model.)

To all whom it may concern,.-

Be it known that I, CYEENIUs LAWRENCE, a citizen of the United States,residing in the township of Clyde, county of St. Clair, State ofMichigan, have invented certain new and useful Improvements in Cribs;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same. V

My said invention relates to improvements in cribs adapted to be used inthe construction of docks, breakwaters, and like purposes.

The obj ect of my invention is to construct docks, breakwaters, andsimilar structures in such a manner that the timbers used as the wallsof the crib will be held to the bottom of the water by the entire weightof the stones or other material used in lling, and, further, to soconstruct the crib that the piles used ing the crib, piles, and fillingan entirety, no part being movable without `the entire crib also moving.

The particular construction, arrangement,

said invention I will now proceed to point accompanying drawings,v inwhich Figure lis a perspective of a crib constructed in accordanceV withmy invention, ready to be filled, the piles being shown in position.Fig. 2 is a top plan view of the same.

Referring to said' drawings, A represents the crib, the sides and endsof which are constructed with double walls B C, having a bottom. Thetimbers a of the inner walls project across the space between the twowalls and are interlocked with timbers of the outer wall. The entirestructure is braced by cross-beams b, which are secured to the` uppertier of the timbers of both the inner and outer walls and extend acrossthe top of the inner and outer compartments of the crib. This bracingalso serves to receive the flooring or superstructure desired.

The compartment or space within the inner walls is provided with a solidbottom or flooring D, the timbers of which are of sundcient strength tobear the weight of the lling.

The crib is sunk by illing the inner compartment with stones or othersuitable material, and when it is in the proper position piles vE aredriven between the inner and outer walls. The piles at the corners ofthe inner walls are connected by chains F, which eX- tend over the topof the projecting timbers a, thus securing the crib to the piles. Whenthe piles are driven, the space between said inner and outerwalls is*then filled with stone or other suitable material.

My invention possesses many advantages lover the old forms ofsingle-wall cribs. It can be readily sunk at the desired point by simplylilling the inner compartment with stone. The solidity given the criband firmness with which it is held to the ground by the weight of theiilling, which is borne by the solid bottom of the inner compartment,prevents the force of the water from raising any part of the cribwithout moving the entire crib. The pilesl also, being driven in thespace between the inner and outer walls and being secured as described,are greatly strengthened, and their usefulness increased by the weightof the crib, which tends to hold said piles iirmly in place, thuspreventing all vibration and consequent weakening.

Having thus-fully described my invention, I claim as new and desire tosecure by Letters Patentl. The herein-described crib, having doublewalls, a space between said walls open at the top and bottom, and' acompartment within the inner walls, having a solid bottom, substantiallyas shown and described.

2. 'A crib having outer and inner walls, B and C, secured to each otherby the projecting timbers a, a space between said walls open at the topand bottom, and a compartment within the inner walls, B, having a solidbottom, D, substantially as shown and described.

3.r The combination, with the cribs having double walls, a space betweensaid walls open at the top and bottom, and a compartment within theinner walls, having a solid bottom, of suitable piles driven between theinner and IOO outer Walls of the erib, substantially as shown l anddescribed.

Jthe Corners of the compartment being con- 4. The e0n1binati0n,\vith thecrib having neeted by chains F, extending over the tim 1o bers a,substantially as shown and described. inner and outer Walls B C, a spacebetween T T T 5 said Walls Open at the ,top and bottoni, and a CX RELIUS LAVVREB CE' Vitnesses:

ALEX. R. AVERY, l JNO. L. ELLIOT.

compartment Within the inner Walls, having a solid bottom, of suitablepiles, E, driven between said inner and outer Walls, the piles at

